390 lines
11 KiB
Go
390 lines
11 KiB
Go
package trie
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import (
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"encoding/hex"
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"encoding/json"
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"fmt"
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"io/ioutil"
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"math/rand"
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"net/http"
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"time"
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checker "gopkg.in/check.v1"
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"github.com/ethereum/go-ethereum/ethutil"
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)
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const LONG_WORD = "1234567890abcdefghijklmnopqrstuvwxxzABCEFGHIJKLMNOPQRSTUVWXYZ"
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type TrieSuite struct {
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db *MemDatabase
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trie *Trie
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}
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type MemDatabase struct {
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db map[string][]byte
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}
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func NewMemDatabase() (*MemDatabase, error) {
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db := &MemDatabase{db: make(map[string][]byte)}
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return db, nil
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}
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func (db *MemDatabase) Put(key []byte, value []byte) {
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db.db[string(key)] = value
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}
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func (db *MemDatabase) Get(key []byte) ([]byte, error) {
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return db.db[string(key)], nil
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}
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func (db *MemDatabase) Delete(key []byte) error {
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delete(db.db, string(key))
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return nil
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}
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func (db *MemDatabase) Print() {}
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func (db *MemDatabase) Close() {}
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func (db *MemDatabase) LastKnownTD() []byte { return nil }
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func NewTrie() (*MemDatabase, *Trie) {
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db, _ := NewMemDatabase()
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return db, New(db, "")
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}
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func (s *TrieSuite) SetUpTest(c *checker.C) {
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s.db, s.trie = NewTrie()
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}
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func (s *TrieSuite) TestTrieSync(c *checker.C) {
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s.trie.Update("dog", LONG_WORD)
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c.Assert(s.db.db, checker.HasLen, 0, checker.Commentf("Expected no data in database"))
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s.trie.Sync()
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c.Assert(s.db.db, checker.HasLen, 3)
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}
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func (s *TrieSuite) TestTrieDirtyTracking(c *checker.C) {
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s.trie.Update("dog", LONG_WORD)
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c.Assert(s.trie.cache.IsDirty, checker.Equals, true, checker.Commentf("Expected no data in database"))
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s.trie.Sync()
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c.Assert(s.trie.cache.IsDirty, checker.Equals, false, checker.Commentf("Expected trie to be dirty"))
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s.trie.Update("test", LONG_WORD)
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s.trie.cache.Undo()
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c.Assert(s.trie.cache.IsDirty, checker.Equals, false)
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}
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func (s *TrieSuite) TestTrieReset(c *checker.C) {
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s.trie.Update("cat", LONG_WORD)
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c.Assert(s.trie.cache.nodes, checker.HasLen, 1, checker.Commentf("Expected cached nodes"))
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s.trie.cache.Undo()
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c.Assert(s.trie.cache.nodes, checker.HasLen, 0, checker.Commentf("Expected no nodes after undo"))
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}
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func (s *TrieSuite) TestTrieGet(c *checker.C) {
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s.trie.Update("cat", LONG_WORD)
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x := s.trie.Get("cat")
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c.Assert(x, checker.DeepEquals, LONG_WORD)
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}
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func (s *TrieSuite) TestTrieUpdating(c *checker.C) {
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s.trie.Update("cat", LONG_WORD)
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s.trie.Update("cat", LONG_WORD+"1")
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x := s.trie.Get("cat")
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c.Assert(x, checker.DeepEquals, LONG_WORD+"1")
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}
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func (s *TrieSuite) TestTrieCmp(c *checker.C) {
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_, trie1 := NewTrie()
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_, trie2 := NewTrie()
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trie1.Update("doge", LONG_WORD)
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trie2.Update("doge", LONG_WORD)
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c.Assert(trie1, checker.DeepEquals, trie2)
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trie1.Update("dog", LONG_WORD)
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trie2.Update("cat", LONG_WORD)
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c.Assert(trie1, checker.Not(checker.DeepEquals), trie2)
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}
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func (s *TrieSuite) TestTrieDelete(c *checker.C) {
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s.trie.Update("cat", LONG_WORD)
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exp := s.trie.Root
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s.trie.Update("dog", LONG_WORD)
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s.trie.Delete("dog")
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c.Assert(s.trie.Root, checker.DeepEquals, exp)
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s.trie.Update("dog", LONG_WORD)
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exp = s.trie.Root
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s.trie.Update("dude", LONG_WORD)
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s.trie.Delete("dude")
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c.Assert(s.trie.Root, checker.DeepEquals, exp)
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}
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func (s *TrieSuite) TestTrieDeleteWithValue(c *checker.C) {
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s.trie.Update("c", LONG_WORD)
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exp := s.trie.Root
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s.trie.Update("ca", LONG_WORD)
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s.trie.Update("cat", LONG_WORD)
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s.trie.Delete("ca")
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s.trie.Delete("cat")
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c.Assert(s.trie.Root, checker.DeepEquals, exp)
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}
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func (s *TrieSuite) TestTriePurge(c *checker.C) {
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s.trie.Update("c", LONG_WORD)
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s.trie.Update("ca", LONG_WORD)
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s.trie.Update("cat", LONG_WORD)
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lenBefore := len(s.trie.cache.nodes)
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it := s.trie.NewIterator()
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num := it.Purge()
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c.Assert(num, checker.Equals, 3)
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c.Assert(len(s.trie.cache.nodes), checker.Equals, lenBefore)
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}
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func h(str string) string {
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d, err := hex.DecodeString(str)
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if err != nil {
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panic(err)
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}
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return string(d)
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}
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func get(in string) (out string) {
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if len(in) > 2 && in[:2] == "0x" {
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out = h(in[2:])
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} else {
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out = in
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}
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return
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}
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type TrieTest struct {
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Name string
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In map[string]string
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Root string
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}
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func CreateTest(name string, data []byte) (TrieTest, error) {
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t := TrieTest{Name: name}
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err := json.Unmarshal(data, &t)
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if err != nil {
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return TrieTest{}, fmt.Errorf("%v", err)
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}
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return t, nil
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}
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func CreateTests(uri string, cb func(TrieTest)) map[string]TrieTest {
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resp, err := http.Get(uri)
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if err != nil {
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panic(err)
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}
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defer resp.Body.Close()
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data, err := ioutil.ReadAll(resp.Body)
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var objmap map[string]*json.RawMessage
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err = json.Unmarshal(data, &objmap)
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if err != nil {
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panic(err)
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}
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tests := make(map[string]TrieTest)
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for name, testData := range objmap {
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test, err := CreateTest(name, *testData)
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if err != nil {
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panic(err)
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}
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if cb != nil {
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cb(test)
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}
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tests[name] = test
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}
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return tests
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}
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func RandomData() [][]string {
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data := [][]string{
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{"0x000000000000000000000000ec4f34c97e43fbb2816cfd95e388353c7181dab1", "0x4e616d6552656700000000000000000000000000000000000000000000000000"},
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{"0x0000000000000000000000000000000000000000000000000000000000000045", "0x22b224a1420a802ab51d326e29fa98e34c4f24ea"},
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{"0x0000000000000000000000000000000000000000000000000000000000000046", "0x67706c2076330000000000000000000000000000000000000000000000000000"},
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{"0x000000000000000000000000697c7b8c961b56f675d570498424ac8de1a918f6", "0x6f6f6f6820736f2067726561742c207265616c6c6c793f000000000000000000"},
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{"0x0000000000000000000000007ef9e639e2733cb34e4dfc576d4b23f72db776b2", "0x4655474156000000000000000000000000000000000000000000000000000000"},
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{"0x6f6f6f6820736f2067726561742c207265616c6c6c793f000000000000000000", "0x697c7b8c961b56f675d570498424ac8de1a918f6"},
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{"0x4655474156000000000000000000000000000000000000000000000000000000", "0x7ef9e639e2733cb34e4dfc576d4b23f72db776b2"},
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{"0x4e616d6552656700000000000000000000000000000000000000000000000000", "0xec4f34c97e43fbb2816cfd95e388353c7181dab1"},
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}
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var c [][]string
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for len(data) != 0 {
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e := rand.Intn(len(data))
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c = append(c, data[e])
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copy(data[e:], data[e+1:])
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data[len(data)-1] = nil
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data = data[:len(data)-1]
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}
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return c
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}
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const MaxTest = 1000
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// This test insert data in random order and seeks to find indifferences between the different tries
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func (s *TrieSuite) TestRegression(c *checker.C) {
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rand.Seed(time.Now().Unix())
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roots := make(map[string]int)
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for i := 0; i < MaxTest; i++ {
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_, trie := NewTrie()
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data := RandomData()
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for _, test := range data {
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trie.Update(test[0], test[1])
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}
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trie.Delete("0x4e616d6552656700000000000000000000000000000000000000000000000000")
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roots[string(trie.Root.([]byte))] += 1
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}
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c.Assert(len(roots) <= 1, checker.Equals, true)
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// if len(roots) > 1 {
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// for root, num := range roots {
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// t.Errorf("%x => %d\n", root, num)
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// }
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// }
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}
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func (s *TrieSuite) TestDelete(c *checker.C) {
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s.trie.Update("a", "jeffreytestlongstring")
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s.trie.Update("aa", "otherstring")
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s.trie.Update("aaa", "othermorestring")
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s.trie.Update("aabbbbccc", "hithere")
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s.trie.Update("abbcccdd", "hstanoehutnaheoustnh")
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s.trie.Update("rnthaoeuabbcccdd", "hstanoehutnaheoustnh")
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s.trie.Update("rneuabbcccdd", "hstanoehutnaheoustnh")
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s.trie.Update("rneuabboeusntahoeucccdd", "hstanoehutnaheoustnh")
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s.trie.Update("rnxabboeusntahoeucccdd", "hstanoehutnaheoustnh")
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s.trie.Delete("aaboaestnuhbccc")
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s.trie.Delete("a")
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s.trie.Update("a", "nthaonethaosentuh")
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s.trie.Update("c", "shtaosntehua")
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s.trie.Delete("a")
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s.trie.Update("aaaa", "testmegood")
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_, t2 := NewTrie()
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s.trie.NewIterator().Each(func(key string, v *ethutil.Value) {
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if key == "aaaa" {
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t2.Update(key, v.Str())
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} else {
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t2.Update(key, v.Str())
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}
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})
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a := ethutil.NewValue(s.trie.Root).Bytes()
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b := ethutil.NewValue(t2.Root).Bytes()
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c.Assert(a, checker.DeepEquals, b)
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}
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func (s *TrieSuite) TestTerminator(c *checker.C) {
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key := CompactDecode("hello")
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c.Assert(HasTerm(key), checker.Equals, true, checker.Commentf("Expected %v to have a terminator", key))
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}
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func (s *TrieSuite) TestIt(c *checker.C) {
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s.trie.Update("cat", "cat")
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s.trie.Update("doge", "doge")
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s.trie.Update("wallace", "wallace")
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it := s.trie.Iterator()
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inputs := []struct {
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In, Out string
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}{
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{"", "cat"},
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{"bobo", "cat"},
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{"c", "cat"},
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{"car", "cat"},
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{"catering", "doge"},
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{"w", "wallace"},
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{"wallace123", ""},
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}
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for _, test := range inputs {
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res := string(it.Next(test.In))
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c.Assert(res, checker.Equals, test.Out)
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}
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}
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func (s *TrieSuite) TestBeginsWith(c *checker.C) {
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a := CompactDecode("hello")
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b := CompactDecode("hel")
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c.Assert(BeginsWith(a, b), checker.Equals, false)
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c.Assert(BeginsWith(b, a), checker.Equals, true)
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}
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func (s *TrieSuite) TestItems(c *checker.C) {
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s.trie.Update("A", "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa")
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exp := "d23786fb4a010da3ce639d66d5e904a11dbc02746d1ce25029e53290cabf28ab"
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c.Assert(s.trie.GetRoot(), checker.DeepEquals, ethutil.Hex2Bytes(exp))
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}
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/*
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func TestRndCase(t *testing.T) {
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_, trie := NewTrie()
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data := []struct{ k, v string }{
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{"0000000000000000000000000000000000000000000000000000000000000001", "a07573657264617461000000000000000000000000000000000000000000000000"},
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{"0000000000000000000000000000000000000000000000000000000000000003", "8453bb5b31"},
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{"0000000000000000000000000000000000000000000000000000000000000004", "850218711a00"},
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{"0000000000000000000000000000000000000000000000000000000000000005", "9462d7705bd0b3ecbc51a8026a25597cb28a650c79"},
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{"0000000000000000000000000000000000000000000000000000000000000010", "947e70f9460402290a3e487dae01f610a1a8218fda"},
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{"0000000000000000000000000000000000000000000000000000000000000111", "01"},
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{"0000000000000000000000000000000000000000000000000000000000000112", "a053656e6174650000000000000000000000000000000000000000000000000000"},
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{"0000000000000000000000000000000000000000000000000000000000000113", "a053656e6174650000000000000000000000000000000000000000000000000000"},
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{"53656e6174650000000000000000000000000000000000000000000000000000", "94977e3f62f5e1ed7953697430303a3cfa2b5b736e"},
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}
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for _, e := range data {
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trie.Update(string(ethutil.Hex2Bytes(e.k)), string(ethutil.Hex2Bytes(e.v)))
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}
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fmt.Printf("root after update %x\n", trie.Root)
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trie.NewIterator().Each(func(k string, v *ethutil.Value) {
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fmt.Printf("%x %x\n", k, v.Bytes())
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})
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data = []struct{ k, v string }{
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{"0000000000000000000000000000000000000000000000000000000000000112", ""},
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{"436974697a656e73000000000000000000000000000000000000000000000001", ""},
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{"436f757274000000000000000000000000000000000000000000000000000002", ""},
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{"53656e6174650000000000000000000000000000000000000000000000000000", ""},
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{"436f757274000000000000000000000000000000000000000000000000000000", ""},
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{"53656e6174650000000000000000000000000000000000000000000000000001", ""},
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{"0000000000000000000000000000000000000000000000000000000000000113", ""},
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{"436974697a656e73000000000000000000000000000000000000000000000000", ""},
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{"436974697a656e73000000000000000000000000000000000000000000000002", ""},
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{"436f757274000000000000000000000000000000000000000000000000000001", ""},
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{"0000000000000000000000000000000000000000000000000000000000000111", ""},
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{"53656e6174650000000000000000000000000000000000000000000000000002", ""},
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}
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for _, e := range data {
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trie.Delete(string(ethutil.Hex2Bytes(e.k)))
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}
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fmt.Printf("root after delete %x\n", trie.Root)
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trie.NewIterator().Each(func(k string, v *ethutil.Value) {
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fmt.Printf("%x %x\n", k, v.Bytes())
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})
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fmt.Printf("%x\n", trie.Get(string(ethutil.Hex2Bytes("0000000000000000000000000000000000000000000000000000000000000001"))))
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}
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*/
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